Steam-engine.



No. 628,953. Patented July l8, I899. E. MOCDNVILLE.

STEAM ENGINE.

(Application filed Dec. 1, 1898.]

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Patented luly l8, I899. r:v McCUNVlLLE.

STEAM ENGINE ion filed Dec. 1, 189 8.)

2 Sheets-Shani 2.

- (No Model.)

#vinesses Nrrnn STATES PATENT @FFICE.

EMMET" MCCONVILLE, OF PITTSBURG, PENNSYLVANIA;

STEAM-ENGINE;

srncrrrcArron forming part of Letters Patent No. 628,953, dated m 18,189d.

Application filed December 1, 1898. Serial No. 697,983. (No model.)

To all whom it may concern:

Be it known that I, EMME'rr MoOonviLLn,

a citizen of the United States,residing at Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented certain new anduseful Improvements in Steam-Engines; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention has reference to improvements in steam-engines whereby muchsaving of steam and increased horse-power are gained, and which consistsof certain novel features of construction, which will be here inafterfully described in the specification and pointed out in the claims.

The object of my invention is to so construct a steam-engine that areciprocating cylinder which moves in an opposite direction to thewithin'contained piston upon ways or guides will have the friction uponsaid moving cylinder reduced to a minimum through the medium offriction-rollers properly arranged between the moving cylinder and itssupportingguides.

A further object of my invention is to so construct the connecting-rodwith springs or any other yielding devices that all undue shocks will beeliminated from the wrist-pin when the engine is changing its positionfrom forward to backward stroke or the opposite.

A further object of my invention is to connect a rocking lever upon amoving cross-head, with its opposite ends attached, respectively, to aneccentric-rod and a valve-rod.

A further object of my invention is to pro vide a pair of cross-heads,one connected direct to a piston and connecting rod and having openingsfor allowing reach-bars for-connecting to the cylinder-head, theopposite ends being secured to a yoke cross-head adjacent to twoconnecting rods.

A further object of my invention is to provide parallel jointed steamconnections whereby a movable cylinder can reciprocate and allow saidjointed rods to accommodate them selves to the moving cylinder.

It is obvious to those conversant with steamengines that this class hasadvantages not possessed by stationarycylinder engines. The cylindermoving opposite to the piston In theldrawings, Figure lis a side elevation of my improved engine. Fig. 2 isa plan of the same. Fig. 3is a planindetail of the cross-heads and cylinder-heads, parts being broken awayand partly in section, exhibitin g the construction and relativeposition of the three connecting-rods. Fig. 4 is a front elevation ofthe yoke cross-head with the valve-rod lever pivoted thereon and thereach- I bars and connectingrods secured thereto. Fig. 5 is a frontelevation of the piston-rod cross-head. Fig. 6 is a transverse verticalsection of the steam-cylinder and valve--cham ber secured to itsaccompanying guides or ways by friction-rollers. Fig. 7 is a detail,partly in section, of a connecting-rod head, exhibiting the means forarranging the spring devices. Fig. 8 is a detail in section of therelative position the guides or ways assume toward the cylinder, withthe friction-rollers removed to exhibit more fully the bearingsurfacesfor the friction-rolls. Fig. 9 is a modification of the friction-rollsand their bearings in the guides and cylinder.

The en gine consists of a bed A, having ordinary boxes for a shaft B andwhich are integral with three cranksviz., two side cranks b b and acentral crank b. The side cranks I) carry connecting-rods G O. Theopposite ends of said connecting-rods O are secured to a yoke cross-headD by means of pivotal pins cl (2, respectively. Also secured to saidyoke cross-head D by pins 61 are reach-bars E E, their opposite endsbeingsecured by pins e e through earsff, the latter being integral withthe front cylinder-head F of the steam-cylinder F. The central crank 19,previously re- .ferred to, carries a much heavier connectingrod 0 andwhich is secured at its opposite end to a cross-head G. Said cross-headsupports the piston-rod H, which makes direct connection with thesteam-cylinder through the medium of a piston. Gross-head G has tworectangular openings 9 g for allowing the reach-bars E to pass throughfreely, but not contacting said openings g.

The mainconnecting-rod 0', previously reeccentric-rod L at its lower endferred to, not only receives all the load that comes upon its crank, butit also must operate the side cranks b for moving the reciprocatingcylinder F, and to provide for sudden shocks outside of cushioning bythe steam, which may, or may not operate, I provide an effective meansthrough the medium of two opposing springs I, (see Fig. 7,) which willbe hereinafter more fully set forth.

Secured to the yoke cross-head by means of a wrist-pin 7c is a lever K,fulcrumed near its lower end and adapted to connect with an and at itsupper end to a valve-rod M.

Secured to the bed A by bolts a are ways or 7 guides N, having anexternal Vshaped contour a for the reception of friction-rollers P. Theways F upon the cylinder F are internally V-shaped in their contour andmake connection with Ways N through the medium of friction-rollers P,previously referred to. (See Fig. 6.) To-p'revent any slight movement ofthe steam-cylinder and to keep it in aline ment, I provide an annularrib p centrally located on each friction-roller, and I alsoprovide-longitudinal grooves f in the V-bearings n and F respectively,for said ribs to move By this means the cylinder is in perfect alinementboth laterally and vertically.

The friction-rollers P are provided with oilholes 10 and also covers q,the latter for pre venting dust from entering among the rollers.

The springs I, previously referred to, play against the opposite ends ofa bisected box R. Said box is secured in the head of the connecting-rodby side flanges 4'. (Shown in dotted lines in Fig. 7.) Boxes Rarerecessed for holding said springs. Projections s extend partly into saidrecesses to more fully operate as bearing-surfaces for springs I to restagainst.

Fig. 9 is a modification of the friction-rollers, which are well adaptedfor heavy reciprocating cylinders. The reciprocating cylinder isconnected to jointed steam connections 25, which oscillate in harmonywith the reciprocating steam-cylinder and furnish steam and exhaustsimilar to a stationary cylinder.

Having described my invention, that which I desire to secure by LettersPatent'of the United States is-'- v r 1. I11 combination with areciprocating steam-cylinder moving on ways or guides, friction-rollersinterposed between said cylin= der and guides, longitudinal grooves inprojections integral with said cylinder, also similar grooves in theways or guides secured to the engine-bed, said guides being adapted toreceive friction-rolls which are provided with annular ribs for enteringsaid longitudinal grooves in the cylinder and Ways, for the purpose asshown and described.

2. In combination with a reciprocating en'- gine mounted on ways securedto an engine bed and operated by two reach-rods and threeconnecting-rods and two cross-heads, of an eccentric and valve rodconnection through the medium of a lever pivoted to a movable yokecross-head, as specified.

3. In combination with a steam-engine, a connecting-rod provided with abisected box, and an enlarged head surrounding said box, springs atopposite ends or sides of said box located in recesses formed in thesame, and projections integral with the connecting-rod and extendinginto said recesses against said springs, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

EMMET' MCCONVILLE.

\Vitnesses: W. REEs EDELEN,

D. McOoNvILLE.

